Corn-mill.



C. S. ELLIS.

CORN MILL.

APPLlcATloN FILED 1AN.24. |912.

3 SHEETS-SHEET 1.

el Hoznm C. S. ELLIS.

CORN MILL.

APPLICATION FILED IAN. 24. I9I2.

UB,- I-I. Patented Nov. 28, 1916.

3 SHEETS-SHEET 2.

C. S. ELLIS.

CORN MILL.

APPLICATION FILED IAN. 24, I9I2.

I ,m6, I I IPaIen-Id Nov. 28, 1916.

3 SHEETS-SHEET 3.

@AVERE FAFFT CHARLES S. ELLIS, 0F ORE HILL, NORTH CAROLINA.

CORN-MILL.

Application filed January 24, 1912.

To all whom it may concern Be it known that I, CHARLES S. ELLIS, acitizen of the United States of America, residing at Ore Hill, in thecounty of Chatham and State of North Carolina, have invented new anduseful Improvements in Corn-Mills, of which the following is aspecification.

rihis invention relates to mills, and it has particular reference tomills for grinding corn and the like of that class in which the stonesor grinding elements are disposed vertically so that the runner stonewill rotate about an approximately horizontal axis.

@ne object of the invention is to improve the construction of the frameor casing, said casing comprising a stationary and an ad justablemember, one of which contains, the runner stone and the other the bedstone, thus enabling the bed stone to be trammed up or adjusted withreference to the runner stone in an easy and expeditious manner.

A further object of the invention is to simplify and improve theconstruction and operation of the feeding device.

A further object of the invention is to combine with the runner stone afan which, when the lmill is in operation, will operate to dispose voffine dust arising from the grinding operation.

With these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claim.

ln the accompanying drawings has been illustrated a simple and preferredform of the invention, it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theclaim may be resorted to when desired.

In the drawings, Figure 1 is a front elevation of a grinding millconstructed in accordance with the invention. Fig. 2 is a longitudinalvertical sectional view of the same. Fig. 3 is a horizontal sectionalview taken on the line 3-3 in'Fig. 2. Fig. 4; is an end elevation. Fig.5 is a vertical transverse sectional view taken on the line 5-5 lll 2:mit

Corresponding parts in the several figures are denoted by likecharacters of reference.

Specicaton of Letters Patent.

Patented Nov. 28, 1016.

Serial No. 673,051.

The casing of the mill comprises two sections or members A and B whichare adapted to telescope one within the other. ln the accompanyingdrawing the runner stone casing B has been shown as telescoping into thebed stone casing A, but this condition may be reversed when desired. Thebed stone 1 is securely mounted in the casing member A where it may befirmly secured by embedding it in cement,shown at 2. The casing member Acontaining the bed stone has been shown as consisting of an integralcasting, while the casing member B containing the runner stone has beenshown as comprising a hoop 3 and a head i suitably connected therewith.,this being a simple and inexpensive construction. The runner stoneeasing B has also been shown as equipped with a discharge spout 5. Thecasing mem ber A forms part of a stand including legs or uprights 6having feet 7 adapted to rest upon a suitable support, said feet beingprovided with elongated slots 8 for the passage of fastening members,such as bolts 9, whereby the casing member may be secured icln positionupon supporting sills or upon a oor.

The casing member A includes a box or bearing 10 which is adapted tosupport one end of the shaftll which extends through the eye of the bedstone, said shaft carrying a feed screw 12. The shaft is additionallysupported in boxes or bearings 13, 111 upon frame stands 15, 16 betweenwhich it carries a pulley 17 adapted to receive motion by means of abelt or band from a suitable source of power. The casing member A isalso equipped with a feed chute 18 through which the material that is tobe ground is fed to the eye of the bed stone from which it istransferred by means of the feed screw 12 to the space between thegrinding faces of the bed stone 1 and the runner stone 19. The latter issuitably mounted upon the shaft 11 within the casing member B by meansof a hub 20, and said hub also carries a fan composed of a plurality ofwings or blades 21. The head 4 of the casing member B is provided withan aperture 22.

The frame stands 15 and 16 are provided with feet 23 having apertures24'for the passage of securing bolts or fastening members, and saidstands are securely connected together by means of brace rods 25. rlhestand 15, which for convenience will be designated as the middle stand,is adjustably connected with the frame structure comprising the casingmember A and the legs G by means of brace rods 26 which are threaded atone end, as shown at 27, and screwed into suitable sockets 2S in themiddle frame 15, where said rods are iirmly secured by means of locknuts 29. Four brace rods are preferably used, the same being disposedabout equidistantly. The opposite ends of the rods 26 are lreduced topresent shoulders 30, as best seen in Fig. 1 of the drawings, saidshoulders abutting upon the legs 6 and upon the lugs 11. that extendoutwardly from the casing member A, said legs and lugs being aperturedfor the passage of the Vreduced ends of the rods 26 which are threadedas shown and provided with tightening nuts 32 whereby the parts areconnected together very securely and in such a manner as to avoidvibration. At the same time it will be seen that by loosening the nuts32 and the lock nuts 29,.as well as the fastening` members 9, thethreaded ends 27 of the rods 26 may be adjusted-in the sockets 28 so asto effect relative adjustment of the telescoping casing members A' andB. By this construction it will be seen that the casing membercontaining the bed stone is capable of adjustment toward and from thecasing member containing the runner stone, and positive adjustment maybe made by each of the four rods 26,'independently, thus enabling thebed stone to be trammed or trued with reference to the runner stone andalso coupling the casing members A and B together in such a manner as toenable adjustment to be readily effected. It'will be understood that therods 26 might within the scope vof this `invention be connected lrigidlyw-ith the middle frame and adjustably with the frame member includingthe casi-ng'A, the object being simply to enable the telescoping membersA and B to be relatively adjusted in order to effect the desiredadjustn'ient of the bed stone with reference to the runner stone.

Frame members 33', which may be mounted upon some of the brace rods 26serve to support a hopper 34 from which the mill is fed. The framemem-bers 33' are connected together by bars 35' supporti-ng depending`straps 3G which are connected by a cross bar ape-n. which. a feed shoe38 is pivotally mounted, said feed sh-oe ybeing connected with one oftheframe members 33 by means of a coi'led spring 39 whereby it isresiliently forced in one direction The casing member A supports anupright 40 carrying a pulley 4:1 which is connected by a band 42 With apulley 43' upon the shaft 11.Y The shaft or spi'ndlfe 44.carrying theVpulley 41 alsocarries a. cam or eccentric 45 enga-ging a strap 46 uponone side of the shoe 38 which by the tension oitthe spring 39' is heldin constant engagement with said eccentric, sothat when the eccentricrotates about its axis it will operate to vibrate the pivotallysupported shoe 2h, thereby discharging material from the latter into themouth of the feed chute 18. This feed movement, as will be seen, isextremely simple and effective and is operated constantly when the millis in operation.

The end stand 1G of the f 'ame structure is provided with apertures forthe passage of bolts or rods 47 which slidably engage said frame standand are provided at their inner ends with springs 4S retained inposition by means of nuts 49. The outer ends of the rods 47 areconnected together by a cross bar or yoke 50 which is firmly securedupon said rods, and said yoke has a threaded aperture for the passage ofa screw 52 having a hand wheel 53 whereby it may be adjusted, said screwbearing at its inner end against a follower 5S within a hub or sleeve 54which is bolted upon the frame stand 16 and which limits the movement inone direction of the spring pressed yoke 50, said sleeve having arms 59which are apertured for the passage of the rods 47. Between the follower5S and the end of the shaft 11 anti-friction balls 55 are interposed toreduce friction between the shaft and the screw 52. It will be observedthat by tightening the screw 52 against the follower 58, the springs 4Supon the rods 47 will be placed under tension, the degree of tensionbeing regulated by the screw 52, which latter carries a lock nut 56having a handle 57 whereby it may be readily tightened against the yoke50 for the purpose of securing the adjusting screw at the desiredadjustment. The shaft 11 carrying the run` ner stone will obviously beforced by the tension of the springs 48 in the direction of the bedstone, the adjustment being capable of very minute regulation. It isobvious that material fed through the chute 18 and through the eye ofthe bed stone will pass between the faces of the stones where it isproperly reduced, the degree of inencss being capable of being veryaccurately gaged by the preliminary adjustment 0f the bed stone withreference to the face of the runner stone, while the latter is capableof yielding against the tension of the springs 4S in the event of anyparticle of hard substance, such as a piece of metal or the like beingaccidentally fed between the stones along with the material to beground, thereby avoiding injury to the mill.

From the foregoing description, taken in connection with the drawingshereto annexed, the operation and advantages of the improved mill willbe readily understood. The construction is simple and inexpensive, andthe mill has proven in practical operation to be thoroughly efficientfor the purpose for which it is designed. It may be especially notedthat in the grinding of various grades of corn, it is particularlydesirable that the meal be reduced to precisely the proper' degree ofneness in order to make a thoroughly satisfactory and superior product,and the facility With which relative adjustment of the bed and runnerstones may be effected enables this object to be attained in aconvenient and satisfactory manner.

Having thus described the invention, what is claimed as new, is

A mill comprising uprights adapted to be movably mounted upon a support,a bed stone supported by the uprights, a frame mounted in fixed positionopposite the movable uprights7 a runner stone journaled for rotation inthe frame, means for adjusting the runner stone toward the bed stone,means for resiliently holding said adjusting means and the runner stonetoward the bed stone, rods screvv threaded in the frame and disposedtransverselyacross the bed stone beyond the edges thereof, said rodsbeing journaled in the uprights and restrained against longitudinalmovement in the same and means for locking the rods to the frame.

In testimony whereof I aflx my signature in presence of tWo Witnesses.

CHARLES S. ELLIS. Witnesses M. S. ELLIS, E. H. FAUs'r.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of atents, Washington, D. C."

